The immortal power of the ChakraÔäó is driven by its ultra lightweight polycarbonate shell and Composite FusionÔäó Technology, delivered at a reasonable price point. The PLUS version includes all the advantage of the mainline ChakraÔäó plus an expanded polycarbonate protective wrap around the bottom edges of the helmet as well as an all season bug/winter liner. Product features: Composite FUSIONÔäó Technology. Ultra lightweight Polycarbonate Shell. Expanded rear coverage design. Breakaway visor. Dial Fit Adjustment System. PC bottom wrap. Included Winter/Bug liner. Helmet sizing: S (50-54 cm), M (54-58 cm) and L (58-62 cm).